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(_77^192)Ir→(_-1^0)β+(_78^192)Pt
Ir-192 releases gamma rays which are used to examine hard to reach or hard to see places via radiography.
Cf-252 emits neutrons which we can effect other atoms. Depending on how the atoms react to the neutrons, we can tell what they are. With this technique, workers in airports can tell if nitrogen, an ingredient in explosives, is in a bag without actually opening it.
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Iridium-192 undergoes beta decay and gamma emission.
Iridium is a silvery-white metal
Two radioisotopes are commonly used for airport security:
Iridium -192
and
Californium - 252
Ir-192 undergoes beta decay and gamma emission. It has a half life of about 73.83 days.
Airports must have security and screening for safety in airplanes. Radioisotopes are used to scan baggage to make sure passengers are not carrying anything dangerous onto the plane.
Cf-252 produces neutrons via spontaneous fission. It has a half-life of about 2.6 years.
Californium-252 undergoes
spontaneous fission.
Californium is a darker, silver metal
Pictures:
https://upload.wikimedia.org/wikipedia/commons/a/a8/Iridium-2.jpg
<img src="http://gozend.com/wp-content/uploads/2014/11/gold.jpg" alt="Image result for californium-252"/
>https://assets.bwbx.io/images/users/iqjWHBFdfxIU/it2DWgapZM9Q/v1/-1x-1.jpg
https://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Tarom.b737-700.yr-bgg.arp.jpg/1200px-Tarom.b737-700.yr-bgg.arp.jpg
Sources:
"Californium.” Periodic Table, www.elementsdatabase.com/Californium-Cf-98-element/.
“Radiation from Airport Security Screening.” Centers for Disease Control and Prevention, Centers for Disease Control and Prevention, 7 Dec. 2015, www.cdc.gov/nceh/radiation/airport_scan.htm.
“Radioisotopes in Industry.” Radioisotopes in Industry | Industrial Uses of Radioisotopes - World Nuclear Association, www.world-nuclear.org/information-library/non-power-nuclear-applications/radioisotopes-research/radioisotopes-in-industry.aspx.
Swallow, Erica. “The Science Behind Airport Body Scanners.” Mashable, Mashable, 17 Nov. 2011, mashable.com/2011/11/17/tsa-body-scanner/#fuvmaN_85Eqz